Iran's foreign minister says Iran asked the International Atomic Energy Agency two days ago to establish a technical commission that would evaluate the plan for sending most of its low-enriched uranium to Russia.

After processing, it would be returned to Iran for use as fuel in a Tehran research reactor.

The head of the Iranian parliament's national security committee, Alaeddin Boroujerdi, told state media his committee does not support the deal because Iran has "no guarantee" it will get its uranium back.

A lawmaker on the national security committee Kazem Jalali said Iran has suspicions about whether the West will respect the terms of the deal.

The agreement, backed by the International Atomic Energy Agency, is aimed at preventing Iran from enriching uranium to the point at which it can be used for nuclear weapons.

On Saturday, U.S. Secretary of State Hillary Clinton called on Iran to accept the deal and fulfill its obligations over its nuclear program. She told reporters in Jerusalem that "patience has its limits" and that the United States will not wait "forever."